CN216244996U - Novel evaporator with metal foam fins - Google Patents

Abstract

The application discloses novel evaporimeter of metal foam fin formula relates to heat exchange equipment and makes technical field. The utility model comprises a fixed baffle, an evaporation coil, fins and porous metal foam. A plurality of fixed stop form shell structure, and evaporating coil, fin and porous metal foam all set up in shell structure. One end of the evaporation coil is provided with a condensing agent inlet, and the other end of the evaporation coil is provided with a condensing agent outlet. The fins are arranged on the circumferential surface of the evaporation coil and arranged along the length direction of the evaporation coil. An air inlet is arranged at one end of the shell structure parallel to the direction of the fins. The other end of the shell structure parallel to the fins is provided with an air outlet which is positioned at one end far away from the evaporating coil pipe provided with a condensing agent outlet. The porous metal foam is filled in the gaps between the evaporating coil and the fins, and the porosity of the porous metal foam is gradually increased along the air flowing direction. The utility model realizes the purposes of uniform refrigeration and high-efficiency refrigeration of the evaporator.

Description

Novel evaporator with metal foam fins

Technical Field

The application relates to the technical field of heat exchange equipment manufacturing, in particular to a novel evaporator with metal foam fins.

Background

A vaporizer is an object that converts a liquid substance into a gas. The evaporator is also a key refrigeration accessory of a refrigerator and an air conditioner in daily life, the heat dissipation performance of the evaporator directly determines the overall energy-saving performance of the refrigerator and the air conditioner, and specifically the evaporator can be divided into a wire tube evaporator, a plate tube evaporator, a blown evaporator and a fin evaporator. The fin evaporator has the characteristics of large surface area and relatively good heat dissipation and refrigeration effects, and is a trend of current evaporator application.

With the progress of society and the development of science and technology, foam metal is gradually added into the finned tube evaporator by some manufacturers. The foam metal has rich specific surface area and can cover large heat exchange area, and the complicated gap structure in the foam metal can effectively strengthen disturbance of airflow flow, so that air is in a turbulent flow state in the evaporator, and convection heat exchange between the refrigerant and the air is enhanced. Because metal copper has good heat-conducting property, copper tubes are mostly adopted as evaporating tubes in the existing practical evaporator, and fins and foam metal are generally copper or aluminum and directly welded on the copper tube evaporator so as to enhance the refrigerating effect of the evaporator.

However, in the use process of the existing fin evaporator, the foam metal void ratio is the same, so that the problems of uneven refrigeration and low refrigeration efficiency of the evaporator are caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a novel evaporator of metal foam fin formula, has solved the problem that the refrigeration of evaporator is inhomogeneous and refrigeration efficiency is low among the prior art, has realized that the evaporator refrigeration is even and high-efficient refrigeration purpose.

The utility model provides a novel evaporator with metal foam fins, which comprises a fixed baffle, an evaporation coil, fins and porous metal foam, wherein the fixed baffle is arranged on the evaporator coil;

a plurality of said fixed baffles forming a shell structure, said evaporator coil, said fins and said porous metal foam all disposed within said shell structure;

one end of the evaporation coil is provided with a condensing agent inlet, and the other end of the evaporation coil is provided with a condensing agent outlet;

the fins are arranged on the circumferential surface of the evaporation coil and are uniformly arranged along the length direction of the evaporation coil;

an air inlet is formed in one end, parallel to the fin direction, of the shell structure, and the air inlet is located at one end, far away from the evaporation coil pipe provided with the condensing agent inlet, of the shell structure; an air outlet is formed in the other end of the shell structure parallel to the fin direction, and the air outlet is located at one end, far away from the evaporation coil pipe provided with the condensing agent outlet, of the shell structure;

the porous metal foam is filled in the gaps between the evaporation coil and the fins, and the porosity of the porous metal foam is gradually increased along the air flowing direction.

Preferably, the evaporation coil comprises a plurality of evaporation straight pipes and U-shaped pipes, and the ends of two adjacent evaporation straight pipes are connected through the U-shaped pipes to form the evaporation coil;

and in the horizontal direction, the plane where the straight evaporation pipe is located is not filled with the porous metal foam.

Preferably, the porous metal foam is bonded to the evaporator coil by a thermally conductive adhesive.

Preferably, a guide fan is disposed at one side of the air outlet so that the air can flow out of the air outlet.

Preferably, the evaporating coil and the fins are both made of metal.

Preferably, the evaporating coil and the fins are made of metal copper materials.

Preferably, a liquid storage tank is arranged at the condensing agent inlet.

Preferably, the fins are welded to the evaporator coil.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

the embodiment of the utility model provides a novel evaporator with metal foam fins, which completes condensation work of the evaporator by adopting the cooperation of an evaporation coil, fins and porous metal foam arranged in a fixed baffle. Specifically, high-temperature gas enters the shell structure from the gas inlet, enters the evaporator for condensation and then is discharged from the gas outlet. The refrigerant is changed into a low-temperature and low-pressure state after flowing through the compressor, the condenser and the expansion valve, the low-temperature and low-pressure condensing agent enters the evaporating coil from the condensing agent inlet, the evaporating coil, the fins and the porous foam metal respectively absorb heat in high-temperature gas, and the condensing agent in the evaporating coil absorbs heat and is gasified and then discharged from the condensing agent outlet. During the cooling process, because the air flowing direction is opposite to the refrigerant flowing direction, the temperature of the refrigerant gradually increases along the refrigerant flowing direction, the cooling effect gradually deteriorates, and therefore the pore gap of the porous metal foam gradually increases along the opposite direction of the refrigerant flowing direction (i.e. the air flowing direction) to achieve the uniform cooling effect. The novel evaporator with the metal foam fins provided by the utility model effectively solves the problems of uneven refrigeration and low refrigeration efficiency in the prior art, and achieves the purposes of even refrigeration and high-efficiency refrigeration of the evaporator.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a front view of a novel evaporator with metal foam fins according to an embodiment of the present application;

FIG. 2 is a right side view of a novel evaporator of the metal foam fin type provided by an embodiment of the present application;

fig. 3 is a top view of a novel evaporator with metal foam fins provided in the embodiments of the present application.

Reference numerals: 100-fixed baffle; 110-an air inlet; 120-gas outlet; 200-an evaporating coil; 210-a refrigerant inlet; 220-refrigerant outlet; 300-a fin; 400-porous metal foam; 500-a fan; 600-a liquid storage tank; 700-metal transition tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

As shown in fig. 1 to 3, the embodiment of the present invention provides a novel evaporator of a metal foam fin type, which comprises a fixed baffle 100, an evaporation coil 200, fins 300 and porous metal foam 400. A plurality of fixed baffles 100 form a shell structure within which the evaporator coil 200, fins 300 and porous metal foam 400 are disposed. One end of the evaporation coil 200 is provided with a refrigerant inlet 210, and the other end is provided with a refrigerant outlet 220. The fins 300 are disposed on the circumferential surface of the evaporating coil 200, and are uniformly disposed along the length direction of the evaporating coil 200. Both fins 300 and evaporator coil 200 are used to absorb and transfer heat from the air flow to the refrigerant circulating within evaporator coil 200.

An air inlet 110 is arranged at one end of the shell structure in the direction parallel to the fins 300, and the air inlet 110 is positioned at one end far away from the evaporating coil 200 provided with the condensing agent inlet 210; an air outlet 120 is arranged at the other end of the shell structure in the direction parallel to the fins 300, and the air outlet 120 is positioned at one end far away from the evaporation coil 200 provided with the condensing agent outlet 220; the air flow enters the interior of the housing structure from the air inlet 110, is cooled by the evaporation coil 200 with fins 300 arranged in the housing structure, and then flows out through the air outlet 120.

The porous metal foam 400 is filled in the gap between the evaporating coil 200 and the fin 300, and the porosity of the porous metal foam 400 is gradually increased in the air flow direction. The porous metal foam 400 has a high thermal conductivity and a rich specific surface area, and thus can compensate for the defect of poor heat transfer between the gas and the evaporating coil 200. Further combining the high thermal conductivity of the fins 300 with the uniform thermal conductivity of the porous metal foam 400 improves the heat exchange performance of the evaporator. In the heat exchange process of the evaporator, a part of heat in the air flow is transferred to the refrigerant through the fins 300 and the evaporation coil 200, and the other part of heat is transferred to the gaps of the porous metal foam 400 and then transferred to the refrigerant through the porous metal foam 400. However, in the prior art, the physical parameters of the porous metal foam 400 in the entire evaporator are the same, and when the refrigerant and the air flow in the opposite direction, the cooling effect at the refrigerant inlet 210 is good, but the cooling effect at the refrigerant outlet 220 is poor, and further, the heat transfer effect in the air flow direction has a certain difference. Therefore, in the air flowing direction, the porosity of the porous metal foam 400 is arranged in a gradient manner, and the heat exchange process of the evaporator is further refined, so that the purpose of uniformly and efficiently cooling the evaporator is achieved.

The novel evaporator with metal foam fins provided by the embodiment of the utility model completes the condensation work of the evaporator by adopting the cooperation of the evaporation coil 200, the fins 300 and the porous metal foam 400 which are arranged in the fixed baffle 100. Specifically, the high temperature gas enters the housing structure through the inlet 110, condenses in the evaporator, and exits through the outlet 120. The refrigerant is changed into a low-temperature and low-pressure state after flowing through the compressor, the condenser and the expansion valve, the low-temperature and low-pressure refrigerant enters the evaporating coil 200 from the refrigerant inlet 210, the evaporating coil 200, the fins 300 and the porous metal foam 400 respectively absorb heat in high-temperature gas, and the refrigerant in the evaporating coil 200 absorbs heat and is gasified and then discharged from the refrigerant outlet 220. In the cooling process, since the direction of the air flow is opposite to the direction of the refrigerant flow, the temperature of the refrigerant gradually increases along the direction of the refrigerant flow, and the cooling effect gradually deteriorates, so that the pore space of the porous metal foam 400 gradually increases along the opposite direction of the refrigerant flow (i.e., the direction of the air flow) to achieve a uniform cooling effect. The novel evaporator with the metal foam fins provided by the utility model effectively solves the problems of uneven refrigeration and low refrigeration efficiency in the prior art, and achieves the purposes of even refrigeration and high-efficiency refrigeration of the evaporator.

As shown in fig. 1, in a preferred embodiment, the evaporator coil 200 includes a plurality of straight evaporator tubes and U-shaped tubes, and the ends of two adjacent straight evaporator tubes are connected by the U-shaped tubes to form the evaporator coil 200; the plurality of straight evaporating pipes and the plurality of U-shaped pipes in the evaporating coil 200 are communicated with each other.

In the horizontal direction, the plane in which the straight evaporation tubes lie is not filled with the porous metal foam 400. Therefore, resistance of the air flow in the circulation process in the shell structure is reduced, and the refrigeration efficiency of the evaporator is further improved.

As shown in fig. 1-3, in a preferred embodiment, the porous metal foam 400 is bonded to the expansion coil 200 by a thermally conductive adhesive. The porous metal foam 400 is generally connected to the metal evaporator coil 200 by welding, and the welding spots thereof often have problems of dripping, cracking and corrosion. Therefore, the porous metal foam 400 is connected with the evaporation coil 200 by the heat-conducting glue, so that the normal operation of the evaporator is ensured, and the service life of the evaporator is prolonged.

As shown in fig. 1 and 2, in a preferred embodiment, a guide fan 500 is provided at one side of the air outlet 120 so that air can flow out from the air outlet 120. The air current of guiding fan 500 in to shell structure leads, prevents the long-time delay of the inside air current of shell structure, and the emergence of the poor problem of evaporimeter heat transfer effect that leads to.

As shown in fig. 1-3, in the preferred embodiment, both the evaporator coil 200 and the fins 200 are made of metal. Further, the evaporating coil 200 and the fins 200 are made of metal copper materials. In another embodiment, the evaporator coil 200 may be made of aluminum, iron, or other thermally conductive metal. In addition, in another embodiment, the fins 200 may be made of aluminum, iron, or other thermally conductive metal. The copper evaporation coil 200 has strong thermal conductivity and corrosion resistance, and further improves the heat exchange efficiency of the evaporator.

As shown in FIG. 1, in the preferred embodiment, a liquid storage tank 600 is disposed at the condensing agent inlet 210, the liquid storage tank 600 includes a liquid storage tank inlet and a liquid storage tank outlet, the liquid storage tank inlet is connected to the condenser through a metal transition pipe 700, and the liquid storage tank outlet is connected to the condensing agent inlet 210. During the refrigerant circulation, the receiver 600 stores the liquid refrigerant in the condenser, on the one hand, reducing the load on the condenser. On the other hand, the amount of refrigerant supplied can be adjusted to accommodate load fluctuations of the evaporator. When the load change of the evaporator is increased, the demand of the condensing agent is increased, and the liquid storage tank 600 supplements the condensing agent in the evaporator; accordingly, when the load variation of the evaporator is reduced, the required amount of the condensing agent is reduced, and the remaining condensing agent is stored in the liquid storage tank 600.

As shown in fig. 1, in a preferred embodiment, the fins 200 are welded to the evaporation coil 200, and by means of welding, on one hand, the fins 200 and the evaporation coil 200 can be connected more fixedly, on the other hand, gaps between the fins 200 and the evaporation coil 200 are reduced, and the heat exchange area is increased by metal welding points, so that the heat exchange efficiency of the evaporator is improved.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims (8)

1. The novel evaporator with the metal foam fins is characterized by comprising a fixed baffle (100), an evaporation coil (200), fins (300) and porous metal foam (400);

a plurality of said fixed baffles (100) forming a shell structure within which said evaporator coil (200), said fins (300) and said porous metal foam (400) are disposed;

one end of the evaporation coil (200) is provided with a condensing agent inlet (210), and the other end is provided with a condensing agent outlet (220);

the fins (300) are arranged on the circumferential surface of the evaporation coil (200) and are uniformly arranged along the length direction of the evaporation coil (200);

an air inlet (110) is arranged at one end of the shell structure parallel to the direction of the fins (300), and the air inlet (110) is positioned at one end of the evaporation coil (200) far away from the condensing agent inlet (210); an air outlet (120) is formed in the other end of the shell structure parallel to the direction of the fins (300), and the air outlet (120) is located at one end, away from the evaporation coil (200) provided with the condensing agent outlet (220);

the porous metal foam (400) is filled in the gap between the evaporation coil (200) and the fin (300), and the porosity of the porous metal foam (400) is gradually increased along the air flowing direction.

2. The novel evaporator of metal foam fin type as recited in claim 1, wherein said evaporation coil (200) comprises a plurality of evaporation straight pipes and U-shaped pipes, and the ends of two adjacent evaporation straight pipes are connected through said U-shaped pipes to form said evaporation coil (200);

in the horizontal direction, the plane of the straight evaporation pipe is not filled with the porous metal foam (400).

3. The evaporator as claimed in claim 1, wherein the porous metal foam (400) is bonded to the evaporating coil (200) by a thermally conductive adhesive.

4. The evaporator as claimed in claim 1, wherein a guide fan (500) is provided at one side of the air outlet (120) so that gas can flow out of the air outlet (120).

5. The evaporator as claimed in claim 1, wherein the evaporator coil (200) and the fins (300) are made of metal.

6. The evaporator as claimed in claim 1, wherein the evaporating coil (200) and the fins (300) are made of copper metal.

7. The evaporator as claimed in claim 6, wherein a liquid storage tank (600) is provided at the refrigerant inlet (210).

8. The evaporator as claimed in claim 6 or 7, wherein the fins (300) are welded to the evaporating coil (200).

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